Gas to oil ratio

Discussion in 'Motorized Bicycle General Discussion' started by addenton223, Sep 16, 2011.

  1. addenton223

    addenton223 New Member

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    What is the perfect oil to gas ratio that will make my 66cc motor run the smoothest?

    And what's the best way to measure that?
     
  2. 2door

    2door Moderator
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    Break in @ 24:1 then after a couple of gallons move down to a 32:1 mix. That's assuming a good quality 2 stroke oil formulated for air cooled engines.
    There are alternatives such as Opt-2 and other synthetic or semi-synthetic oils.
    Use the search feature and you'll have plenty to read on the subject.

    http://www.google.com/cse?cx=partne...otorbicycling.com/f3/gas-oil-ratio-33655.html

    Tom
     
  3. KCvale

    KCvale Well-Known Member

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    As for easy I use 2 plastic measuring cups for the above ratios that I use as well.
    2/3 cup oil in a 1 gallon gas can for break-in.
    1/2 cup after break-in.
    It just doesn't get much easier than that, and the dollar store has whole sets of measuring cups for $1 so get a couple sets ;-}
     
  4. usindian

    usindian New Member

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    What's the best oil to use synthetic or regular?
     
  5. KCvale

    KCvale Well-Known Member

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    You want your motor to 'break in' properly which means a little wear so everything seats and meshes well inside the engine. Non-synthetic 2-stroke oil is best for that, I use whatever cheap non-synthetic stuff I find at the auto parts store or Ace hardware.

    After break-in go synthetic from then on.
    As for brand I have no preference other than cost.
    Amsoil (Amway) and others have 50:1 and 100:1 2-stroke oils, I have tried a both but always low-balled the mix. For example if it says 100:1 I'll mix it 80:1, for 50:1 maybe 40:1. If you can the same friction reduction with less oil then that means more gasoline so a very slight performance advantage but not enough for me to justify the higher price.

    Many places carry little 4oz bottles for 32:1 for a gallon of gas but you pay out the butt having it in a per-measured container. Whatever you buy, buy it by the quart and save some money ;-}
     
  6. littletinman

    littletinman New Member

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    http://www.csgnetwork.com/oilfuelcalc.html


    This is also a life saver calculator when you don't feel like doing math.

    Based on this, it's 5.3 ounces per gallon for break in, and then 4 ounces per gallon after words.

    I user whatever Advance has (It's a hop away from my home). Get the bigger containers and save some cash. I'm still trying to find a decent 2 stroke oil measuring cup/system.
     
  7. KCvale

    KCvale Well-Known Member

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    Read 3 posts up ;-}
     
  8. littletinman

    littletinman New Member

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    Ah, my boy eyes kicked in. Thanks!
     

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